when you create a profile you have a whole bunch of links options you see

like forums  guestbook etc etc

these are invisible to anyone but admins and you untill you add sometyhing to them

so if you want to  have a guestbook available you have to post to it 1st

you can also have your own personal forums  for any subject

i think u can set it to followers only or  global (anyone can see) if followers only it will not be indexed or seen by search engines

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My new book Ban The Taboo Vol 1